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Subject[PATCH] modpost: always show verbose warning for section mismatch
Date
Unless CONFIG_DEBUG_SECTION_MISMATCH is enabled, modpost only shows
the number of section mismatches.

If you want to know the symbols causing the issue, you need to rebuild
with CONFIG_DEBUG_SECTION_MISMATCH. It is tedious.

I think it is fine to show annoying warning when a new section mismatch
comes in.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

scripts/Makefile.modpost | 1 -
scripts/mod/modpost.c | 27 +++++----------------------
2 files changed, 5 insertions(+), 23 deletions(-)

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index c0b7f52..6b7f354 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -77,7 +77,6 @@ modpost = scripts/mod/modpost \
$(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
$(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
- $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 26bf886..0b0d108 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -35,7 +35,6 @@ static int vmlinux_section_warnings = 1;
static int warn_unresolved = 0;
/* How a symbol is exported */
static int sec_mismatch_count = 0;
-static int sec_mismatch_verbose = 1;
static int sec_mismatch_fatal = 0;
/* ignore missing files */
static int ignore_missing_files;
@@ -1406,8 +1405,6 @@ static void report_sec_mismatch(const char *modname,
char *prl_to;

sec_mismatch_count++;
- if (!sec_mismatch_verbose)
- return;

get_pretty_name(from_is_func, &from, &from_p);
get_pretty_name(to_is_func, &to, &to_p);
@@ -1655,9 +1652,7 @@ static void extable_mismatch_handler(const char* modname, struct elf_info *elf,

sec_mismatch_count++;

- if (sec_mismatch_verbose)
- report_extable_warnings(modname, elf, mismatch, r, sym,
- fromsec, tosec);
+ report_extable_warnings(modname, elf, mismatch, r, sym, fromsec, tosec);

if (match(tosec, mismatch->bad_tosec))
fatal("The relocation at %s+0x%lx references\n"
@@ -2433,7 +2428,7 @@ int main(int argc, char **argv)
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;

- while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awE")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:e:mnsT:o:awE")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@@ -2465,9 +2460,6 @@ int main(int argc, char **argv)
case 's':
vmlinux_section_warnings = 0;
break;
- case 'S':
- sec_mismatch_verbose = 0;
- break;
case 'T':
files_source = optarg;
break;
@@ -2525,18 +2517,9 @@ int main(int argc, char **argv)
}
if (dump_write)
write_dump(dump_write);
- if (sec_mismatch_count) {
- if (!sec_mismatch_verbose) {
- warn("modpost: Found %d section mismatch(es).\n"
- "To see full details build your kernel with:\n"
- "'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
- sec_mismatch_count);
- }
- if (sec_mismatch_fatal) {
- fatal("modpost: Section mismatches detected.\n"
- "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
- }
- }
+ if (sec_mismatch_count && sec_mismatch_fatal)
+ fatal("modpost: Section mismatches detected.\n"
+ "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
free(buf.p);

return err;
--
2.7.4
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